please welcome gretel ehrlich and neal conan. thank you. [applause] >> when you first went to greenland in 1993, you brought a couple of books with you. what were they? >> they were two of the 13 volumes of the knute roth who traveled in the 1920s, 1924 from dogsled from greenland to point hope, alaska. if it wasn't for him we would know very little about arctic culture. >> what did we learn from him? >> everything. we learned that, so, inuit people originally came across the bearing land bridge from northeastern siberia and they have year by year, perhaps 20,000 years ago, first to alaska, then through the archipelago, what we call the northwest passage was really the traditional passageway east for them, and they ended up in greenland about roughly 5000 years ago. it's one language with a lot of dialects. one lifeway with some variations according to where they were and what they needed to do to get food but it's the only single culture that spans 6,000 miles, just across the top. and these people said, oh, we're not going to move to at t